I need Help With My Chat Script

So I'm Working On A Script That Certain Jobs Can Use And View A Private Way To Communicate Or "Comms"
I Run A MilitaryRP Server And I'm Trying To Make A System Where A Certain Faction Can Communicate Without Other Faction Metagaming, I Still Fail To Make This And Make It Say This " /us *Name* [USComms] (Message) " I'm trying to get it to work I put it in this location garrysmod/addons/darkrpmodification/lua/darkrp_modules/uscomms/sv_uscomms.lua